I'm always wondering the same thing. I can never find any release notes (do they exist?) and the changelog is only updated sporadically. Also the changelog doesn't seem to show all of the changes made.

Is there any way to know what bugs are being fixed in each build? Or at least attempted to be fixed perhaps in the case of edge? I mostly just care about the release builds, but the one that came out yesterday 4/10 build 9808 has no info either.

I don't even bother reading the changelog anymore because Cpanel is so incredibly
bad about keeping good records on changes and updating the changelog.

Basically in a nutshell, they only seem to update the changelog for major updates
that everyone needs to know about such as a new security hole found and patched
or a major rewrite of some section of Cpanel.

Outside of that --- don't expect to see much of anything posted in changelog!

Personally, I wish they would start documenting every change made but
I guess we can't hope for everything. :D